Of course it is. You may not like it, but things do happen for arbitrary reasons or simply for reasons you disagree with.

We may not know the reason, but that's not the same as saying that things happen for no real reason other than change for its own sake. If you think Starfleet is the kind of organization where the top admiral can wake up one morning and say, "I think we need a change. Fancy maroon uniforms for everyone, make it so!" then you picture a very different type of organization than I do.